Genuine twist-3 contributions to the generalized parton distributions from instantons

Details Genuine twist-3 contributions to the generalized parton distributions from instantons Genuine twist-3 contributions to the generalized parton distributions from instantons

2002-12-26

arxiv.org/abs/hep-ph/0212372v2

Eur.Phys.J. C37 (2004) 105-114

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages

Scientific paper

The genuine twist-3 quark-gluon contributions to the Generalized Parton
Distributions (GPDs) are estimated in the model of the instanton vacuum. These
twist-3 effects are found to be parametrically suppressed relative to the
``kinematical'' twist-3 ones due to the small packing fraction of the instanton
vacuum. We derive exact sum rules for the twist-3 GPDs.

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